You haven't given us much information to work with, Gladdaddd. How old are they now? What are you feeding them?

I suspect the difference is that they are not getting the opportunity to eat natural food that they find. They may also need fine grit for their gizzards to help them digest their food. The ones in the creek find their own.

If they have recovered enough to keep up, the best thing you can do is to reunite them with their family. If not, perhaps you should call a wildlife rehab centre. If they are not growing properly, something is definitely wrong.

It is illegal to keep a wild duck. You must have a permit. If I were you I would get them to a rehhaber, take them back to the creek, or file for a permit.

How were they hurt exactly? I had a baby duck hatch out in my 'bator with a deformed neck and a paralyed leg. His nex is bent at an odd angle, almost an S shape, and he swims in circles because he can really only kick with 1 foot. He was rasied with 2 silkie chickens and now thinks he is one.

Just to let you know, when a duckling is raised by humans the imprint on you and not just think, but know they are human. They loose their insticts and need you to help them survive. Try not to handle them too much and get them back with the mother and siblings as soon as possible. If you have had them for awhile they may already be imprinted on you and you cannot just turn them back out because they do not know how to find food and do duck things. I would consult a rehabber in your area.